Putting kids in the same class because they are born in the same year is obsolete. School systems were originally set up to meet the needs of industrialism. Back then we needed people to work in factories, conformity was good and nobody was meant to excel or be different in that environment. That doesn’t fit our needs today, let alone the future but many schools are still set up like the factories they were meant to serve a 100 years ago.
We should increase choice, give children support to flourish in what interests them and not only give them extra attention in the things they’re bad at. In most schools, if you are good in art but bad in german you get german lessons to get to par with the other students instead of excelling at art… All even, all the same!
Education should be individualised, students should work in groups regardless of age and their education should be built around their needs.